Steam-admission control for exhaust-steam injectors



Sept. 29, 1925.

H. DEUTSCH s'rmu ADMISSION CONTROL FOR EXHAUST STEAM INJECTORS Filed April 24. 5

flansjeutsch /tl'p'rna y.

Patented Sept. 29, 1925.

UNITED STATES.

ms nnorscn, or VIENNA, AUSTRIA.

STEAM-ADMISSION CONTROL FOR' ExEAUST-STEAM INJECTORS.

Application filed April 24,1925. Serial no. 25,765.

To all whom it may concern:

Be it known that I, HANS DEUTSCH, a citizen of the Republic of Austria, residing at Vienna, Austria, have invented certain new and useful Improvements in a Steam-Admission Control for Exhaust-Steam Injectors, of which the following is a specification.

My invention relates to the steam admission controlling arrangements of injectors and particularly of exhaust steam injectors worklng with exhaust steam and live steam, bymeans of which first the admission of live steam and then the admission of exhaust steam is governed in succession, thej admission member for the exhaust steam being lifted by means of a shutting off member operated by the pressure of the live steam.

The arrangements hitherto designed for this purpose have the drawback that when the steam branch to the live steam nozzle of theinjector is shut, the steam contained in this branch, which is intended to release the exhaust steam control valve is only escaping very slowly. Consequently the exhaust steam admission member will remain open for a certain time and there is an opportunity for the exhaust steam and if no exhaust steam is present for the waste gases to enter the injector.

This drawback is obviated according to the present invention by providing the steam admission member with "two valves movable relatively to each other one of said valves when closed, shutting off both steam branches, while the other valve movable relatively to the first enables the steam enclosed in one branch to pass into the other, the relative movement of this valve with respect to the shutting valve being however smaller than the greatest valve lift of the latter.

closed and is therefore in this case in its open position. 8 is the steam branch leading into the chamber 9 in which the valve 7 is arranged, 10 is the steam branch leading to the live steam nozzle 2, 11 is a steam chest for the steam admission device which can be set into communication with the injector by means of the ducts 8 and 1O; 12 is a valve that may be lifted by means of a handle 13. The steam chest 11 is provided with two chambers 14 and 15, one of them communicating with the duct 8, while from the other the duct 10 leads to the steam nozzle. Intercommunication between these chambersis provided for, but is controlled by the valve 16 which may establish it or cut it off. The valve 16 is movable on the spindle 17 the maximum displacement of said valve being however preferably smaller glan the maximum valve lift of the valve When the valve 12 first opens the steam from the boiler entering through the duct 18 flows through the steam branch 10 to the live steam nozzle, thereby pressing the valve 16 on its seat. Upon further opening movement of the valve 12 the valve 16 is dragged along by the spindle 17 and opens the passage to steam branch 8, whereby the steam entering into chamber 9 presses down the controlling valve 7 and lifts the flap valve 6. When valve 12 is shut, atmospheric pressure will instantaneously prevail in the branch 10 as the steam contained therein escapes through the branch 10, the cone 2 and the overflow valve 19. The steam enclosed in the chamber 9, the duct 8 and the chamber 14'will lift thevalve 16 and escapes through chamber 15 and the branch 10 into the open, so that very rapidly atmospheric pressure will prevail in the chambers 9 and 14 whereby the flap valve will return into its shutting position.

hat I claim is:

1. A steam admission controlling arrangement for exhaust steam injectors worked with live steam and exhaust steam simultaneously, an exhaust steam admission controlling device and a live steam branch for controlling the same, a second live steam branch for the live steam supply of the injector, a steam chest from which both live steam branches are leading, a shuttin off member for controlllng the admission 0 live steam to said steam chest and means to control the intercommunication of said live steam branches within said steam chest.

2. A steam admission controlling arrangement for exhaust steam injectors of the type worked with live steam and exhaust steam simultaneously, an exhaust steam admission controlling device and a live steam branch for controlling the same, a second live steam branch for the live steam supply of the injector, a steam chest from which both steam branches lead, a shutting off member controlling the admission of steam to the steam chest and a second shutting ofi' member operated in conjunction therewith but capable of a limited free displacement relatively thereto for controlling the intercommunication between said branches within the steam chest.

' 3. A steam admission controlling arrangement for exhaust steam injectors, of the type worked with live steam and exhaust steam.

simultaneously, an exhaust steam admission controlling device and a live steam branch for operating the same, a second live steam branch for the live steam supply of the injector, a steam chest communicating with said steam branches, a valve controlling the admission of steam to said steam chest and a second valve arranged in series and operated in conjunctiontherewith within said steam chest between the orifices of said two branches in the chest to control the intercommunication between the same.

4. A steam admission controlling arrangement for exhaust steam injectors of the type worked with live steam and exhaust s eam simultaneously, an exhaust steam admission controlling device and a live steam branch for controlling the same, a second live steam branch for the live steam supply of the injector, a steam chest communicating with said steam branches, a valve operated by hand controlling the admission of steam to said steam chest and a second valve operated in conjunction therewith but capable of limited free displacement relatively thereto, arranged between the orifices of said two branches, said valve being automatically operated by the difl'erence of the steam pressure between said branches and controlling intercommunication between the same.

5. A steam admission controlling arrangement for exhaust steam injectors of the type worked with live steam and exhaust steam simultaneously, an exhaust steam admission controlling device and a live steam branch for operating the same, a second live steam branch for the live steam supply of the injector, a steam chest having two intercommunicating chambers, each chamber communicating with one of said steam branches, a hand 0 erated valve controlling the admission 0 steam to said chest, and a second valve arranged in series therewith, capable of automatically controlling intercommunication between said chambers in accordance with the difference of pressure prevailing between the same.

6. A steam admission controlling arrangement for exhaust steam injectors of the type worked with live steam and exhaust steam simultaneously, an exhaust steam admission controlling device and a live steam branch foroperating the same, a second live steam branch for the live steam supply of the injector, a steam chest communicating with said steam branches, a valve controllin the admission of steam to said chest, a and operated spindle for said valve, a second valve on the same spindle operated in conjunction therewith -but capable of a limited free dis lacement on said spindle relatively to the rst valve to allow automatic operation of the second valve when thefirst valve is at rest, for controlling intercommunication between the same branches within the chest said free displacement being smaller than the valve lift of the first valve.

7. A steam admission controlling arrangement for exhaust steam injectors of the type worked with live steam and exhaust steam simultaneously, an exhaust steam admission controlling device and a live steam branch for operatin the same, a second live steam branch for t e live steam supply of the injector, a steam chest having two chambers, intercommunicating by means of a passage each chamber communicating with one'o said steam branches, a hand operated valve to control the admission of steam to said chest, a spindle for o crating the same, a second -valve arrange in series with the first on the same spindle, adapted to be operated with the spindle in conjunction with the first valve but capable of a limited free displacement relatively thereto allowing antomatic operation to the extent of that displacement, said valve being arranged to control the passage between said chambers in accordance with the pressure difference prevailing between the same;

8. A steam admission controlling arrangement for' exhaust steam injectors of the type worked with live steam and "exhaust'steam simultaneously, an exhaust steam admission controlling device and a live steam branch for operating the same, a second live steam branch for the live steam supply of the injector,-a steam chest having two chambers intercommunicating by means of a passage each chamber communicating with one of sai steam branches, a valve operated by hand to control the admission of steam to said chest, a spindle to operate the same, a second valve arranged on the same spindle and operated in conjunction with the first valve, capable of a limited free displacement with with res ect to the s indle, said valve bein arrange to control t e passage between sai chambers and is automatically operated 1 0 whenever the steam is shut ofl" and one of said steam branches is set into communication with the atmosphere, thus allowing escape of the steam remaining in the one steam branch through the other branch.

9. A steam admission controlling arrange ment for exhaust steam injectors of the type worked with live steam and exhaust steam simultaneously, an exhaust steam admission controlling device and a live steam branch for operating the same, a second live steam branch for the live steam supply of the injector, a steam chest having two chambers mtercommuni'cating by means of a passage, each chamber communicating with one of said steam branches, a valve operated by hand" to control the admission of steam to said chest a spindle to operate the same, a second valve arranged on the same spindle and operated in conjunction with the first valve, capable of a limited free displacement, with respect to the spindle, which is however smaller than the valve lift of the first valve,

said valve controlling the passage between 1 said chambers and being automatically'operated when the steam admission to the steam chest is shut thus causing automatically instantaneous pressure relief in both branches, 1

whenever one of them is set into communication with the atmospher In testimony whereof I aflix my signature.

S DEUTSOH. 

